code: def insert_one(self, document, session=None):
      self._calls += 1
      if self._calls > self._max_calls_before_failure:
          raise pymongo.errors.ConnectionFailure
      else:
          return super().insert_one(document)
  
imports: import mongomock
  import pymongo
  import pymongo.errors
label_desc: Use image node_id 2 for calling the FailingCollection obj's underlying member method code with example usage: obj.insert_one(document, session) and returns: super